Sapphire tube forming method

Forming method of the present invention provides a Sapphire tubes, belongs to crystals forming technology. Will no visible defects of Sapphire Crystal with rubber fixed in pad Shang; will curing good of Sapphire Crystal fixed in NC milling machine work stage; started NC milling machine, drill by needed Sapphire tube diameter consistent of hole; replaced and by needed Sapphire tube od match of diamond drill tube, again determine NC milling machine tool z axis zero points; in Sapphire Crystal Shang drill Sapphire tube diameter concentric of outside round; will processing good of Sapphire tube moved to thermostat heating platform Shang, set heating temperature for 380~400℃, heating and insulation 60 minutes above Off the Sapphire tube, natural cooling at room temperature. Using this method, put an end to the diamond single cutting positioning error, Sapphire tube disadvantages of poor concentricity; also avoids the laser damage on the Sapphire Crystal surface layer, is not conducive to inner wall of hole defects of polishing.

Technical field

Processing technical field of the invention belongs to the crystals, in particular a Sapphire tube forming method.
Since sapphire crystals with high hardness, wear resistance, high temperature, acid and alkali resistance and other characteristics, and have excellent optical properties and, therefore, are widely used in optical instrumentation, as well as a variety of Visual instrument window interface.
Sapphire tubes are mainly used at present laser drilling and diamond single cut to the required size. Its shortcomings are as follows: laser drilling will damage on the Sapphire Crystal surface layer, is not conducive to holes in the polished wall of diamond single size large positioning errors, poor Sapphire tube concentricity and so on.
Contents of invention
In order to solve the technical problems mentioned above, the present invention provides a fast, simple, low cost, Sapphire tube forming method with small dimensions.
The invention through the following technical solutions to achieve:
(I) no visible defects of Sapphire Crystal fixed with glue pad;
(2) to cure a Sapphire Crystal fixed on the CNC milling machine working table;
(3) start a CNC milling machine, Sapphire tube diameter required to drill holes;
(4) replacement and Sapphire tube outer diameter which corresponds to the required diamond pipe, redefine the NC milling machine tool z-axis zero. v
(5) the drilling at the Sapphire Crystal Sapphire tube diameter concentric cylindrical;
(6) moves the processed Sapphire tubes to constant heating platform, set the heating temperature to 380~400 ° c, heating and insulation for more than 60 minutes;
(7) took Sapphire tube, natural cooling at room temperature.
Using this method, put an end to the diamond single cutting positioning error, Sapphire tube disadvantages of poor concentricity; also avoids the laser damage on the Sapphire Crystal surface layer, is not conducive to inner wall of hole defects of polishing.
As this invention further of improved, in above steps (I) in the, by said of rubber for epoxy resin rubber, and in at room temperature Xia curing 30 minutes above, ensure fixed solid; in above steps (3) in the, by said NC milling machine of speed for 800rpm/min, and into to rate for 6mm/min, in above steps (5) in the, by said NC milling machine of speed for 400rpm/min, and into to rate for 3mm/min, such can guarantee production efficiency and processing precision.
Following specific embodiments of the present invention for further instructions.
Will no bubble, and crack and no other obviously visible defects of Sapphire Crystal with rubber fixed in pad Shang; optimization implementation cases for epoxy resin rubber, in at room temperature Xia curing 30 minutes above; will curing good of Sapphire Crystal moved to NC milling machine work stage and fixture fixed; started vertical NC milling machine, installation and by needed Sapphire tube diameter match of diamond drill tube; determine NC milling machine tool zero points; drill Sapphire tube hole, in speed 800rpm/min, and into to rate 6mm/min conditions Xia, Using NC milling machine in Sapphire Crystal Shang drill Sapphire tube hole; replaced and by needed Sapphire tube od match of diamond drill tube, again determine NC milling machine tool z axis zero points; drill Sapphire tube outside round, in speed 400rpm/min, and into to rate 3mm/min conditions Xia, using NC milling machine in Sapphire Crystal Shang drill Sapphire tube outside round; will processing good of Sapphire Crystal moved to thermostat heating platform Shang; set heating temperature for 380~400 ° c, heating and insulation 40 minutes above Off the Sapphire tube, natural cooling at room temperature.
By adopting the technologies, easy processing, low processing costs, small size error, internal and external surface characteristics of high precision, fast processing size range for diameter < 300mm, San 25mm inner diameter, length < 250mm Sapphire tubes.
Embodiment of the above description is more specific and detailed, but not understood as limitations on the scope of the patent, it is to be noted that, for the technicians in this field, and on the premise of not from the inventive concept, can also be a number of variants and improvements, which belong to the scope of protection of the invention.

Source: http://www.ch-microtek.com/